Predictable Story, Seems like a copy of the Departed (or Internal affairs) movie concept, Unnecessary romance without any chemistry between leads. Music and acting were only positive . The music was very good . The acting of the main female lead (Han So-hee) was good enough but Park See Hoon's acting was really good . The action was good enough but I hoped for more . Overall it is an average show. It started really well but gone downhill . The last episode was really bad. I would recommend you skip it.